amplifier

Amplifier
An amplifier, electronic amplifier or (informally) amp is an electronic device that increases the power of a signal.
It does this by taking energy from a power supply and controlling the output to match the input signal shape but with a larger amplitude. In this sense, an amplifier modulates the output of the power supply to make the output signal stronger than the input signal. An amplifier is effectively the opposite of an attenuator: while an amplifier provides gain, an attenuator provides loss.
An amplifier can either be a separate piece of equipment or an electrical circuit within another device. The ability to amplify is fundamental to modern electronics, and amplifiers are extremely widely used in almost all electronic equipment. The types of amplifiers can be categorized in different ways. One is by the frequency of the electronic signal being amplified; audio amplifiers amplify signals in the audio (sound) range of less than 20 kHz, RF amplifiers amplify frequencies in the radio frequency range between 20 kHz and 300 GHz. Another is which quantity, voltage or current is being amplified; amplifiers can be divided into voltage amplifiers, current amplifiers, transconductance amplifiers, and transresistance amplifiers. A further distinction is whether the output is a linear or nonlinear representation of the input. Amplifiers can also be categorized by their physical placement in the signal chain.
The first practical electronic device that amplified was the Audion (triode) vacuum tube, invented in 1906 by Lee De Forest, which led to the first amplifiers. The terms "amplifier" and "amplification" (from the Latin amplificare, 'to enlarge or expand') were first used for this new capability around 1915 when triodes became widespread.
For the next 50 years, vacuum tubes were the only devices that could amplify. All amplifiers used them until the 1960s, when transistors appeared. Most amplifiers today use transistors, though tube amplifiers are still produced.
Amplifier - Wikipedia, the free encyclopedia
  1. Bullitt

    Replacement for Arcam delta 60 amplifier

    Hello there, I am after advice as I no longer enjoy listening to records on my hi-fi. I effectively replaced my Arcam with Marantz AVR 2018, only using it as phono pre-amp. The volume pot needs replacing and the input switches often require cleaning. The AVR does a perfectly satisfactory...
  2. jfmamjjasondl

    Question Just received a tube amp and speakers, don't know how to set up

    Hi, I just received an AS-8i MkIII tube integrated amp however I have no idea how to set it up. it came with speakers but they seem much different to my active edifier speakers and much more complicated. Could anyone tell me exactly how to plug them into each other? I figured that my record...
  3. mrperrect1976

    Upgrading amp for my series x advice please

    hi I just got a nice LG c3 55 which is amazing, but I have an issue, I've always played my game consoles via the amp HDMI's then to tv, my amp was the onkyo 608, but using arc their is a massive sound delay, so was thinking of going for the onkyo rz50, but all I here is sound la issues via Xbox...
  4. wuffles

    Wanted Denon or Marantz AV Amp with DAB

    Anything about? Don't need anything more than 5.1, and ideally with DAB (only because I can't rely on the Internet radio streaming working for much longer given the BBC's seemingly endless push of BBC Sounds).
  5. wiz

    Question Anyone tried the aune S9C PRO DAC

    Impressions good or bad Got finger hoovering over buy button Just wondering if it's going to be a sideways move from a SMSL M500 MkII or should i save my pennies and get a Denafrips Aries II
  6. ajex

    For Sale Arcam FMJ A39 black -photos added

    Great condition, sparingly used -120 W stereo amplifier Comes with original remote, it’s huge beast so need space Weighs a ton , collection preferred but will be packed well though original packing recycled All specs here, delivery extra will be at actuals...
  7. C

    For Sale JDS Labs Atom Amp 2

    Headphone amplifier made in USA. Unused. Imported from USA, these amps sell out quickly. Go online and read the Audio Science Review. Bought before realising my streamer already had a built in headphone amplifier. Shipping was a hefty fee on top of the listed price. METAL ENCLOSURE Atom Amp...
  8. catcando

    Wanted Primare A30.2

    Looking for a clean, working A30.2. Prefer black, but silver is okay. Thanks
  9. M

    Question Should I use a PreAmp for DT9080s and Pioneer Elite SC-LX904?

    Hello, I have a Pioneer Elite SC-LX904 11.2 140watts per channel receiver. I have 4 DT9080s with Floor Standing Towers with atmos speakers ontop of each. 1 CS9080 center channel and 2 Klipsch surround speakers and 2 12 inch Klipsch subwoofers All which are rated much higher watts per...
  10. Ed Selley

    Discussion thread: Advance Paris X-i75 Integrated Amplifier Review

    Read the Advance Paris X-i75 Integrated Amplifier Review . Having given us a fascinating take on a CD player, Advance Paris is now showing what they can do with an integrated amplifier. The short answer is ‘quite a bit’… Write your own review for Advance Paris X-i75
  11. M

    Question TagMcLaren AV32 as just a DAC no pre amp

    Hi I'm finding it harder to find info about TM equipment so hoping still some owners on here. If I connect my DVD32r to an AV32r is there a way to just use the DAC and not pre amp so I can pass into my Naim NAC 202 and just use that to control the volume? Also how would I connect the the DVD32r...
  12. Y

    Question Recommend me a headphone combo DAC+Amp (with remote) that connects via Optical to my LG C2 48” OLED TV

    Recommend me a headphone combo DAC+Amp (with remote) that connects via Optical to my LG C2 48” OLED TV I have tried Topping DX3 Pro+ but encountered non stop audio dropout/stuttering/jittering every 5-10 seconds. I have contacted the manufacturer and updated the firmware but still encounter the...
  13. CincyMatt123

    Question M&K subwoofer Push-Pull Polarity

    I am replacing the plate amplifier in my old MX-100 dual 12 push-pull subwoofer. I am in the final stage of replacement. I cannot seem to get an accurate answer on the polarity of the 2 12-inch drivers. One fires forward externally, and one fires up internally from the bottom of the cabinet...
  14. C

    For Sale Kudos Titan 606

    You can read the glowing reviews on the internet regarding these Titan 606 speakers. The speakers are approximately 18 months old and in mint condition (pet free, smoke free, child free home). I have the original boxes too, for ease of transport. Registered for extended warranty which is...
  15. M

    For Sale Nad D3045 stereo amplifier £360

    Nad D3045 Stereo amplifier Excellent condition with all accessories and original box , please see photos. Home demo available if required Fantastic amp with a great spec Collection preferred from SK2 postcode, i can deliver locally (within reason) or i can post at the buyers expense. Features...
  16. M

    For Sale Naim Supernait 3 Integrated Amp - RRP £4299 FOR SALE £2600 ONO

    For Sale - Boxed Naim Supernait 3 Integrated Amp, a real punchy beast of an integrated amp for sale from my late father's setup, hence the great price of £2600 ono. Has driven a Rega Planar 3 and a Naim ND5 XS2 through Neat Acoustics Motive SX1 speakers for around 200 hrs drive time, it's in...
  17. P

    Wanted Balanced 4-channel Amp for Atmos Speakers

    Looking for Balanced Amp with XLR Inputs for 4X Ceiling Atmos Speakers, something similar to: Nord One MP NC122 2-4CH Multi Channel Power Amplifier but ideally less than £400 shipped. Pipe dream?
  18. T

    Question Could you please recommend me a headphone amplifier for Hifiman XS please

    I will be listening via OTG cable from my mobile phone using tidal. My budget is £700, I'm happy to buy used I've read that planar headphones like lots of power? Thanks for any help :)
  19. yoopeyes

    Mixer Amplifier Recommendations for pub

    Hello, I'm upgrading the audio setup at my pub and need advice on choosing a multi-zone amplifier. Here's what I need: 1. Multi-Zone Capability: I need an amplifier that can handle at least 4 zones to control audio independently in different areas of the pub. 2. Multiple Inputs: The amplifier...
  20. mohsin_uk

    Anthem MRX710 overkill?

    My trusted Denon AVR-2310 has been with me around 13 years now in which time it has survived several speaker upgrades. It has now started to lose its memory setting on occasion which may be a small internal battery I assume. I can investigate this at a later date but I have been offered a Anthem...
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